Question

我正在尝试学习如何在对话框中输入多个输入

对于EG以下程序要求用户在单独的框中输入x 1，Y 1和radius的值，如果用户可以在同一个框中输入值X，Y和半径，那么看起来不错的是什么。请让我知道

[code]
import javax.swing.JOptionPane;

public class C3E29GeometryTwoCircles 
{
    public static void main(String[] args) 
    {
        // Ask the user to enter the x1 coordinate.
        String strNumber = JOptionPane.showInputDialog("Enter the value of x1 coordinate " );
        double x1 = Double.parseDouble(strNumber);

        strNumber = JOptionPane.showInputDialog("Enter the value of y1 coordinate  " );
        double y1 = Double.parseDouble(strNumber);

        strNumber = JOptionPane.showInputDialog("Enter the value of radius " );
        double r1 = Double.parseDouble(strNumber);

        strNumber = JOptionPane.showInputDialog("Enter the value of x2 coordinate " );
        double x2 = Double.parseDouble(strNumber);

        strNumber = JOptionPane.showInputDialog("Enter the value of y2 coordinate  " );
        double y2 = Double.parseDouble(strNumber);

        strNumber = JOptionPane.showInputDialog("Enter the value of radius " );
        double r2 = Double.parseDouble(strNumber);

        double distance = Math.sqrt((Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2)));   

        String strOutput;
        if ((distance <= Math.abs(r1 - r2))) 
        {  

           strOutput = "The circle2 is inside circle1 ";
        }
        else if (distance <= (r1 + r2)) 
        {  

           strOutput = "circle2 overlaps circle1";  
        }
        else 
        {  
            strOutput = "circle2 does not overlap circle1";   
        }  
        JOptionPane.showMessageDialog(null, strOutput);
    }
}
[/code]

Answer 1

由于您使用对话框执行所有操作，我认为您还没有进入swing库，在这种情况下，可能最简单的解决方案是从对话框中分割输入。告诉用户按特定顺序输入值，并用逗号，空格等分隔它们，然后在该字符上拆分字符串。

String strNumber = JOptionPane.showInputDialog("Enter the value of x,y and radius, separated by space." );
String[] input = strNumber.split(" ");
double x1 = Double.parseDouble(input[0]);
double y1 = Double.parseDouble(input[1]);
double r1 = Double.parseDouble(input[2]);

编辑：您需要检查/验证输入，以避免NumberFormatException和ArrayIndexOutOfBounds。

“对话框”中的多个值

1 个答案: